Changeset 1233 for trunk/sources/HeuristicLab.Visualization/LineShape.cs

Timestamp:

02/28/09 21:21:59 (15 years ago)

Author:

mstoeger

Message:

General housekeeping (#498) Removed some old unused Z-Order values. Replaced some var types by concrete types. Renamed some LineShape properties. Added caching of Pens and Brushes in LineShape and RectangleShape. Put axis tick calculation algorithm into its own class.

File:

• trunk/sources/HeuristicLab.Visualization/LineShape.cs (modified) (3 diffs)

trunk/sources/HeuristicLab.Visualization/LineShape.cs

@@ -5 +5 @@
   public class LineShape : IShape {
     private RectangleD boundingBox;
-    private double z;
+
     private Color color;
     private int thickness;
-    private DashStyle dashStyle;
+    private DrawingStyle drawingStyle;
+
+    private Pen pen;
 
     /// <summary>
@@ -18 +20 @@
     /// <param name="y2">y coordinate of right lineEndPoind</param>
     /// <param name="color">color for the LineShape</param>
-    public LineShape(double x1, double y1, double x2, double y2, double z, Color color, int thickness, DrawingStyle style) {
+    /// <param name="thickness">tickness of the line in pixels</param>
+    /// <param name="drawingStyle">drawing style of the line (solid, dashed, dotted,...)</param>
+    public LineShape(double x1, double y1, double x2, double y2, Color color, int thickness, DrawingStyle drawingStyle) {
       this.boundingBox = new RectangleD(x1, y1, x2, y2);
-      this.z = z;
       this.LSColor = color;
       this.LSThickness = thickness;
-      if (style==DrawingStyle.Dashed) {
-        this.LSDashStyle = DashStyle.Dash;
-      }
-      else {
-        this.LSDashStyle = DashStyle.Solid;        //default
-      }
+      this.LSDrawingStyle = drawingStyle;
     }
 
@@ -62 +60 @@
     /// <param name="clippingArea">rectangle in screen-coordinates to draw</param>
     public void Draw(Graphics graphics, Rectangle viewport, RectangleD clippingArea) {
-      using (Pen pen = new Pen(LSColor, LSThickness)){
-        pen.DashStyle = this.LSDashStyle;
-        Rectangle screenRect = Transform.ToScreen(boundingBox, viewport, clippingArea);
-        graphics.DrawLine(pen,screenRect.Left, screenRect.Bottom, screenRect.Right, screenRect.Top);
-      }
+      Rectangle screenRect = Transform.ToScreen(boundingBox, viewport, clippingArea);
+
+      graphics.DrawLine(GetPen(), screenRect.Left, screenRect.Bottom, screenRect.Right, screenRect.Top);
     }
 
-    public double Z {
-      get { return z; }
-      set { z = value; }
+    private Pen GetPen() {
+      if (pen == null) {
+        pen = new Pen(LSColor, LSThickness);
+
+        switch (LSDrawingStyle) {
+          case DrawingStyle.Dashed:
+            pen.DashStyle = DashStyle.Dash;
+            break;
+          default:
+            pen.DashStyle = DashStyle.Solid;
+            break;
+        }
+      }
+
+      return pen;
+    }
+
+    private void DisposePen() {
+      if (pen != null) {
+        pen.Dispose();
+        pen = null;
+      }
     }
 
     public Color LSColor {
       get { return color; }
-      set { color = value; }
+      set {
+        color = value;
+        DisposePen();
+      }
     }
 
     public int LSThickness {
       get { return thickness; }
-      set { thickness = value; }
+      set {
+        thickness = value;
+        DisposePen();
+      }
     }
 
-    public DashStyle LSDashStyle {
-      get { return dashStyle; }
-      set { dashStyle = value; }
+    public DrawingStyle LSDrawingStyle {
+      get { return drawingStyle; }
+      set {
+        drawingStyle = value;
+        DisposePen();
+      }
     }
   }